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 ###Instrução: Quais organizações estão associadas a estruturas de IA ética e deram mais de uma palestra?
 ###Tabelas: 
CREATE TABLE ethical_ai_frameworks (id INT PRIMARY KEY, name VARCHAR(255), description TEXT, organization VARCHAR(255)); INSERT INTO ethical_ai_frameworks (id, name, description, organization) VALUES (1, 'Ethical AI 1.0', 'A framework for building ethical AI', 'AI for Good Foundation'); INSERT INTO ethical_ai_frameworks (id, name, description, organization) VALUES (2, 'AI for Climate 1.0', 'A framework for using AI to combat climate change', 'AI for Good Foundation'); INSERT INTO ethical_ai_frameworks (id, name, description, organization) VALUES (3, 'Accessibility 1.0', 'A framework for building accessible tech', 'Tech for Social Impact Inc.'); CREATE TABLE talks (id INT PRIMARY KEY, title VARCHAR(255), speaker_id INT, conference_id INT, organization VARCHAR(255)); INSERT INTO talks (id, title, speaker_id, conference_id, organization) VALUES (1, 'Ethical AI in Healthcare', 1, 1, 'AI for Good Foundation'); INSERT INTO talks (id, title, speaker_id, conference_id, organization) VALUES (2, 'AI for Climate Change', 1, 2, 'AI for Good Foundation'); INSERT INTO talks (id, title, speaker_id, conference_id, organization) VALUES (3, 'Accessibility in Tech', 2, 3, 'Tech for Social Impact Inc.'); INSERT INTO talks (id, title, speaker_id, conference_id, organization) VALUES (4, 'AI for Social Good', 1, 4, 'AI for Good Foundation'); CREATE TABLE conferences (id INT PRIMARY KEY, name VARCHAR(255), city VARCHAR(255), start_date DATE, end_date DATE); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (1, 'AI for Social Good Summit', 'San Francisco', '2022-06-01', '2022-06-03'); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (2, 'Climate Change Tech Conference', 'Vancouver', '2022-07-01', '2022-07-02'); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (3, 'Accessibility in Tech Conference', 'Toronto', '2022-08-01', '2022-08-03'); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (4, 'Ethical AI Conference', 'New York', '2022-09-01', '2022-09-03');
SELECT DISTINCT organization FROM talks WHERE organization IN (SELECT organization FROM ethical_ai_frameworks) GROUP BY organization HAVING COUNT(*) > 1;